proof-of-work | Proof of Work with SHA256 and Bloom filter | Hashing library

 by   indutny JavaScript Version: 3.3.2 License: No License

kandi X-RAY | proof-of-work Summary

kandi X-RAY | proof-of-work Summary

proof-of-work is a JavaScript library typically used in Security, Hashing applications. proof-of-work has no bugs, it has no vulnerabilities and it has low support. You can install using 'npm i proof-of-work' or download it from GitHub, npm.

Proof of Work with SHA256 and Bloom filter

            kandi-support Support

              proof-of-work has a low active ecosystem.
              It has 111 star(s) with 32 fork(s). There are 7 watchers for this library.
              It had no major release in the last 12 months.
              proof-of-work has no issues reported. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of proof-of-work is 3.3.2

            kandi-Quality Quality

              proof-of-work has 0 bugs and 0 code smells.

            kandi-Security Security

              proof-of-work has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              proof-of-work code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              proof-of-work does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              proof-of-work releases are not available. You will need to build from source code and install.
              Deployable package is available in npm.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed proof-of-work and discovered the below as its top functions. This is intended to give you an instant insight into proof-of-work implemented functionality, and help decide if they suit your requirements.
            • MurmurHash .
            • Removes two 32 - bit integers .
            • Creates a new Verifier .
            • compute the sum of a and b
            • Write in buffer to a given buffer .
            • Creates a new bloom filter
            • Read from buffer at a given buffer .
            • The 16 - bit implementation
            • Creates a solver object
            Get all kandi verified functions for this library.

            proof-of-work Key Features

            No Key Features are available at this moment for proof-of-work.

            proof-of-work Examples and Code Snippets

            No Code Snippets are available at this moment for proof-of-work.

            Community Discussions


            Why is Proof of Work necessary in Blockchain?
            Asked 2021-Sep-27 at 14:54

            My question is quite simple, why can't every node in the network follow the same principle for verifying transactions:

            1. Check that the transaction has a unique ID
            2. Check that the digital signature is correct using the public-key of the person sending money
            • No one can fake sending money on the behalf of someone else because they do not have that person's private-key and hence cannot create a valid digital signature for that transaction. No one can copy a previous transaction with a valid digital signature and broadcast to other nodes again because the ID must be unique.

            • This would also remove the notion of "blocks" in a "chain" and lead to a simple ledger.

            I am aware that blockchains already implement this simple system of digital signatures. What I don't understand is, what is the necessity of further verification through proof-of-work? How could someone possibly create an illegitimate block (with one or more illegitimate transactions) which would require this further layer of security? What am I missing here?



            Answered 2021-Sep-27 at 14:54

            You are missing double spending problem. If you have some amount of currency you can create unlimited amount of valid transactions. How you would know which one is correct?

            This is why Proof-of-Work was implemented. It allows nodes to check which transactions are valid, and which try to double spend.



            weird numbers in http response body during python socket programming
            Asked 2021-Jun-29 at 18:19

            I am trying to send a get request to an api and get a response. My code is working fine but there is a problem with body of response, I am getting numbers before and after body of the response. Here is my code:



            Answered 2021-Jun-29 at 18:19

            I am missing something but what?

            You are not taking into account that these responses are using the chunked transfer encoding format (via the Transfer-Encoding: chunked header) to send the body data in chunks instead of a single byte stream, as you are expecting. See RFC 2616 Section 3.6.1 and RFC 7230 Section 4.1 for more details on the chunked format.

            What are they?

            The numbers you are referring to are chunk size indicators.

            • In the 1st response shown, there is a single chunk of data whose byte size is 4a0 (0x4A0 hex, 1184 decimal), followed by a terminating chunk whose byte size is 0.

            • In the 2nd response shown, there is a single chunk of data whose byte size is bcd (0xBCD hex, 3021 decimal), followed by a terminating chunk whose byte size is 0.

            The 0-length chunk ends the body data (there is no Content-Length or Connection: close header present to end the responses otherwise).

            You won't be able to use a simple recv() loop to read chunked bodies. You have to detect the chunked header, and if present then read and parse each chunk individually. Read a chunk size, skip up to the following CRLF, read the specified number of bytes, skip up to the following CRLF. Repeat until a 0-length chunk is reached. Then read a set of trailing HTTP headers that may follow the chunks, overwriting any headers that you read before the body.

            See the pseudo code I present in this answer and this answer.



            How to make this sha256 pow
            Asked 2021-Mar-14 at 10:03

            This is a script that is a simple proof of work and it's in md5 algo. Is there any way I can use it to transfer it to sha256?



            Answered 2021-Mar-14 at 10:03
            from hashlib import sha256
            string = "1"
            complete = False
            n = 0
            while complete == False:
                curr_string = string + str(n)
                curr_hash = sha256(curr_string.encode()).hexdigest()
                n = n + 1
                print(curr_hash + ' ' + curr_hash[:4])



            Why do we not use Istanbul Byzantine Fault Tolerance (IBFT) in Public Blockchains?
            Asked 2021-Jan-18 at 11:11

            As I sad in the title, why is IBFT not used as consensus protocol in public blockchains? After all, it is Byzantine-Fault-Tolerant and prevents forks, which is more than for example Proof-of-Work in Bitcoin does...



            Answered 2021-Jan-18 at 11:11

            The use of the IBFT consensus (as well as any consensus of the BFT group) involves the allocation of a special pool of validators, no more than a few dozen, which, by collecting explicit confirmations from each other, determine the validity of the block (or a separate transaction) and the possibility of its inclusion in the chain (for example, this is how Ripple works). For the public Ethereum, this, firstly, violates the very concept of equality of nodes in the network, and secondly, when trying to expand the pool of validators to a comparable number of nodes participating in the public Ethereum, it will inevitably lead to the collapse of the consensus process.

            Therefore, in the public Ethereum, PoW is used, which does not imply the presence of "special" nodes and any explicit confirmations - the consensus is based on the fact that following the general rules: finding a "lucky" hash and adding a new block to the longest fork, the node has the highest probability of receiving block creation rewards.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install proof-of-work

            You can install using 'npm i proof-of-work' or download it from GitHub, npm.


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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